<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>媒体查询的基本使用 V1</title>
    <style>
        main {
            height: 100vh;

        }
        main{
        }

        @media screen and (min-width: 720px) {
            main {
                background-color: gray;
            }
        }

        @media screen and (min-width: 1180px) {
            main {
                background-color: wheat;
            }
        }
    </style>
</head>
<body>
<main></main>
</body>
</html>
